Data from 1919 MD& G Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.
Locobase suspects that it may never know the weights of the Memphis, Dallas & Gulf locomotives -- a small thing, but frustrating nevertheless. The USRA was stumped about the year this locomotive was built, but the clues suggest 1880s or even earlier. The turned caps on the two domes, one of which is positioned just ahead of the cab, the low boiler pressure, small heating surface, and general layout point to such a provenance. As Baldwin didn't build any 18" x 22" Ten-wheelers with such small drivers after 1873, Locobase has settled on that as the latest possible date. The 2 1/2" diameter for the tubes is given in the drawing; Locobase suspects the figure should actually have been 2 1/4", a size Baldwin adopted before other builders.
Data from 1919 MD & G locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See [], for the ICC's summaries of the 100 or so tap lines involved in a rate case.
Principal Dimensions by Steve Llanso of Sweat House Media | ||
---|---|---|
Class | 200 | 204 |
Locobase ID | 6633 | 6636 |
Railroad | Memphis, Dallas & Gulf | Memphis, Dallas & Gulf |
Country | USA | USA |
Whyte | 4-6-0 | 4-6-0 |
Number in Class | 1 | 1 |
Road Numbers | 200 | 204 |
Gauge | Std | Std |
Number Built | 1 | 1 |
Builder | Burnham, Williams & Co | Rogers |
Year | 1873 | 1886 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 12.42 / 3.79 | 13.17 / 4.01 |
Engine Wheelbase (ft / m) | 23.27 / 7.09 | 23.37 / 7.12 |
Ratio of driving wheelbase to overall engine wheelbase | 0.53 | 0.56 |
Overall Wheelbase (engine & tender) (ft / m) | 45 / 13.72 | 45.26 / 13.80 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 60,000 | |
Engine Weight (lbs / kg) | 80,000 | |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | ||
Tender Water Capacity (gals / ML) | 2800 / 10.61 | 4000 / 15.15 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 | 9 / 8 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 33 / 16.50 | |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 48 / 1219 | 53 / 1346 |
Boiler Pressure (psi / kPa) | 135 / 9.30 | 150 / 10.30 |
High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 22" / 457x559 | 18" x 24" / 457x610 |
Tractive Effort (lbs / kg) | 17,040 / 7729.22 | 18,706 / 8484.91 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.52 | |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 120 - 2.5" / 64 | 200 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 13.25 / 4.04 | 12.08 / 3.68 |
Firebox Area (sq ft / m2) | 105 / 9.76 | 104 / 9.67 |
Grate Area (sq ft / m2) | 14.50 / 1.35 | 14.29 / 1.33 |
Evaporative Heating Surface (sq ft / m2) | 1146 / 106.51 | 1360 / 126.39 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1146 / 106.51 | 1360 / 126.39 |
Evaporative Heating Surface/Cylinder Volume | 176.85 | 192.36 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 1958 | 2144 |
Same as above plus superheater percentage | 1958 | 2144 |
Same as above but substitute firebox area for grate area | 14,175 | 15,600 |
Power L1 | 2785 | 3523 |
Power MT | 306.99 |